Grinding-machine for razor-blades.



T. G, SHEEHAN & J. E. DREW.

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Patented Oct. 7, 1918.

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GRINDING MACHINE FOR RAZOR BLADES. APPLICATION FILED JUNE 30, 1010.

Patented Oct. '7, 1913v 2 SHBETS-SHEET 2.

ii Q; it l i into 1S SHEEHAN RED EOHN E. DREVJ. (3F CITY, NEW SEREEY,ASSIGITORS 1AM DUPLEX RAZOR COMPANY, 01" NEE? $831K, N. i, A CURPORATIONOF QEI'NDIN G-M.A.CHU IE F013, RAZOR-BLADES.

Application filed June 30, 3919.

Specification of Le tiers Patent.

To all whom it may conmw Be it known that We THOMAS C. SHEE- HAN andJul-1N E. DREW, citizens of the Uniteci States, residing at Jersey City,in the county of Hudson and State of New Jersey, have invcutmi 21.11633and usefui ink DYOVEHlQfit in Grinding-iiiachines for 1111201- Biades,of which the foilowing is a specifiration.

This invention relates to a machine for grinding: razor bin-fies,particularly thin replnccahie blades of the type used with car'- ininsafe 1T razors; mui it has for its main 1 production of a machinecapable (iy and. accuiateiy grinding succesblades so that the cuttingedges of 211i 2 iii he exactiy aiii zei Another object is to providemachine k grinding blades in oii, whereby inc and true edges areproduced Without danger of :jury to the temper of the steel.

Stilt another objectis to nrovide a machine in which :1 Blade isautomaticnily carried past and heid against thegzi'inder so hit thegrinding operation is progressive hiadc to the other and inc-m one andof the nii times; unifoirni.

further object is to provide .1 machine ing; at grinder inciudinfl twoseparated the first disk coming into Contact with advancing bhuicserving" torcrnove the ma or portion. of the, material necessary to formthe edge, White the second. disk operte iinisah the winding operationunder icrii'imui mmiucc a smoother ciigc than pzz saibie when only asingie cut is made.

urthci' oifiect is to provide 2 machine in which the around Qti'fi'i; ispolished after ihc n: .urnis completed.

With these ant other objcets'not speciiicuiiy mentioned in iOW, theinvention consistx in certainconstructions and com? nations which iw'iiihe hereinafter fully (icsm'ihctl, anti thou apcciticziiiy get forth inthe claims hereunto appended.

in the accouumnyine; :imwings which form it part of this sgieciiicntinnand in which like characters reiezfence inriiczitc the same parts, i re'3. a ian View of a machine cmisti'umci'i in accmwiance With theinvention. Fig. 2 a front "ievution of the structure shown in i partlyin sectic-Ir shown in Figs. land 2 and Figs.

tion. Fig. is 21 eitie eievation oi the strucmater el.

L the main frame' 5. Upon the'iower end of 5 are tieteii views, upon anemerged scale, of one of the poiisiiiup; whceis shown in Figs. 1, Z and3'. In carrying; the invention into effect, there s provided a gifin ierwhich may vary With- 6% in Wide limits. in the best constructions,however a grinning! Wheei is used. ami this whee may he inadecf anysuitable abrasive in the gievice seiecteti to illusirate the invention.the grinding Wheel inclugies two sepamtcci disks 1 anti 2 past which a,blade is Qi ifiiflti during the grinding operetionin manner to hehereinafter de scriheci. hese disks are fixed upon a shaft 3 iotrnziiedii). o. bracket 4} adju stabiy mounted upon a frame Which is the mainframe of the machine. Upon one enct of this shaft is fixed 2. puiiey 5over which a hole 7 runs. This heit c'ei'ives its motion from a suitableline shaft over the machine and not shown. it may be here remarked thatin the device seiectcii to illustrate the invention, there are twocompie'te grinding wheels and two sets of bingie forwarding devices.These 'Wi'lBQiS and devices are identical, and a dctaiieci do 89scripiion of one is therefore thought to be sufficient to enable theinvention to he fuiiy understooi.

Means are proviaieci for ioi'wai'iting a bhuie to and hoic'ting it"against me grinder during" the grinding operation. and this ,inezinsiniiy vztry fw i thin wide Emits. As shoii' n. a rotating tui'ret 8 isused. for this purpose. it is to he understood, o't'gcourse, the}; thereare two of these turrets. Each of the iiiITQilS is fixed upon the upperanti of a. veiticai shaft Q'iournaiegi in. :1 hearing it) formed in themain fifamc 5. and. eisoin a hearing: 11 formed in ii bracket. 12secured to 5 a each shaft 9' is; fined a worm Wheei 13 which is: in meshwith a worm 1i curried by a herb zontai shaft 15 which is the meintpower shaft of the machine. 'ihis shaft, \is pro-- vi ied with the usimifast'enti loose puiieys 16 g'mtl i. By the mechanism just iei-iP.ii"Q(i., the two turrets simultaneously rotated at the 82111185510855 andin t e some direction on imiicc'tefi hy the The means for foi' ifmgiinga hiafe to, past, the grinder, inchuics a momhie mere hg and :1 stationsmember. The tumretf just (hecbi'hmi constitutes tie m'ovehie mom-- her.The stations :3 memhey "ts in can; cave guides 19 mounteii ugioin'cnugEmilie 5 9 ice shaft 15 before referred to, and also adjacenttheperiphery of the turrets, theconcavity of the guides being concentricwith the periphery; of the turrets. The guides 19 are s aced from theperiphery of the turrets a istance equal to the thickness of the bladesto be opxei rated,v upon. For the purpose of reventl g any ping of ablade place between the penp cry of the turrets and the guides at 20,each of the-turrets is provided with a plurality of sets of positioningpins 21, which are adapted to engage perforations in the blades, whenperforated blades are to be operated upon. It is to beunderstood,'however, that when non-perforated blades are to be operated'upon, other ositioning means may be used in place of tie. pins.

For the purpose of enabling blades to be ground without danger of injuryto the tem per of the steel of which they are made, means are providedfor producing a flow of oil to the surface of the grinder, and thismeans may vary within wide limits. As shown, however a reservoir 22 isrovided, which containsoil of a suitable 0 aracter. From this reservoir,a pipe 23 leads to a pump 24 of a well known type. Since a detaileddescription of this pump is unnecessary to an understanding of thepresent invention, it is omitted in the interest of clearness andbrevity. The pump is driven by a belt 25 running over a pulley 26 on theover pump a pulley 27 on the pump shaft. The

pipe 28 totbranc forces oil up through a pipes 29 and 30 which terminaterespectively in nozzles 31 peripheral surfaces of A flow of oil is thusvents overheating of blades during the grinding operation. The oil thatflows from the nozzles 31 and 32 drops from the wheels to the flangedtable of the frame 5 and flows through a drain pipe 41 into thereservoir 22, from which it is again pumped to the wheels.

For the purpose of finishing the edge of a blade passed through themachine, without rehandling, there is provided a polisher or polishingwheel 33 operating upon the ground edge immediately after the grindingoperation is completed. Each ofthe polishing wheels is mounted in abracket 3-1- suitably positioned adjacent the periphcry of the turretsMeans are provided for adjusting the grinders and polishers toward oraway from the forwarding means or turret to compensat-c for wear and toregulate the depth of the cut taken from the side of the blade blank toform the cutting edge, and to regulate the degree of polish imparted tothe ground edge. This means may vary within wide limits. As shown,however, the same means is employed for adjusting each of the and 32adjacent the the grinding wheels. produced which pre- .lSlleIS may beadjusted the combination with .curved channel adapted to forward a bladegrinders and each "of the olishers; that is to say means identical instructure is employe The brayfikets 4 and 34 are arranged to be clampedupon the vertical arm 35 of a two arm lever 35, 36, by means of a clampscrew 37. The lever 35, 36 is pivoted at 38 to a support 39 secured tothe ewe 5 before referred to. adjusting screw 40 is threaded through thehorizontal arm 36- of the lever and contacts with the support. By thismechanism, the grinders or polvertically and also toward or away from.the forwarding means or turrets.

In the operation of the device, blades are successively laced upon thepins 21 at 20 and guided etween the periphery of the turrets and thecooperating stationar guides, after which the blades are automat1- callyforwarded to and past the'grinders and polishers and back to a positionat the front of the machine where they are taken from the pins.

Changes and variations may be made in the structure by means of whichthe invention is carried into. efiect. The invention, therefore, is notto be restricted to the precise details of the structure shown anddescribed.

What is claimed is 1. In a machine for grinding razor blades,-

a grinding wheel, of a rotating turret provided with pins for engaging aperforated blade to forward it past the grindin wheel, and a concavestationary guide a jacent and concentric with the'periphery of theturret.

2 In a machine for grinding razor blades, the combination with a guidehaving a curved channel adapted to support a normally flat bladetemporarily bent to conform to the curvature of the channel, of a Igrinding wheel projecting into the chan nel, and means for forwarding ablade through the channel.

3. In a machine for grinding razor blades, the combination with a guidehaving a support a normally fiat blade temporarily bent to conform tothe curvature of the channel, said '115 channel being formed by astationary memher and a movable member, of a grinding wheel projectinginto the channel, means for moving the movable member to through thechannel.

4. In a machine for grinding razor blades, the combination channel beingformed by a her and a movable member having a series of pins adapted toengage a perforation in a blade, of a grinding wheel projecting into thechannel, and means for moving the movnot able member to forwards bladethrough the channel.

In a machine for grinding razor blades, the combination with a guidehaving a eurvcd'channel adopted to supports. normally flail; bio "c:tcznporarily bent to conform to the curvature of the channel, said clzinnel being formed by a. stationary member and iinendlesfs movablemember having a series of pins adapted to engage perforation in iiblade, of a grinding wheel projecting into the channel, and means formoving the movable member totorwnrd a blade through the channel.

6. In a machine for grinding razor blades, the combination with a guidehaving a curved channel adupted to support a norinally fiat bladetemporarily bent to conform to the curvature of the channel, said.ehnnnel being formed by a horizontal rotatory turret having-a peripheryunbroken except by a series of pins adapted to enu. perforation in ablade and by a horizontal stationery guide zidjacent the periphery ofthe turret, of a. grinding Wheel projecting into the channel, and meansfor re.- tati'ng the turret to forward '1 blade through the channel.

7. in a machine for grinding razor blades,

the combination with a .gui lc having a curved channel adopted tosupport :1 normally fiat blade temporarily bent to conform tothecurvature of thechennel, of a grinding wheel projecting into thechannel, means for adjusting the wheel toward the channel, f'llLl menusfor forwarding 8. blade through the channel.

In a machine for grinding razor blades, the combination with e, guidehaving a curved channel adapted to support 21 norinally flat bladetemporarily bent to con form to thecurveture of the chzuinel, of agrinding wheel projecting into the channel, means for adjusting thewheel toward and away from the channel, means for adjusting the wheeltransverselywith respect to the channel, and means for forwzirding eblade through the channel.

9. In a machine for grindiigrozor blades, the combination with :1 guidehaving a curved channel adapted to -slipport a normally lint bladetemporarily bent to conform to the curvature of the channel, of agrinding wlieel rojccting into the channel and consisting of a pluralityof separated disks adopted to operate upon a blade held against.displacement by the curvature of the (iliiHlncl and the naturalresiliency of the blade, and means for forwarding a blade through thechannel.

10. In e machine for grinding: razor channel, and means including seesblades, the combination e having it curved channel adapted to support cnor" mally fiat, blade temporarily bent to con form to the curvature'olithe channel, of grindin wheel pojecting into the c-l'zennel, means orforwarding a blade tistough the frame for adjustzibly Sll')gl0l%'il 11.In e. machine for grin blades, the combination v' n having a curvedchannel adapted to sue a normally fiat blade t 'ly bent conform to thecurvature or the channel, of a grinding wheel projector nel, means forforwarding o the channel, and :1 frame support Wheel and having two armsone carrying adjusting screw and the other carrying adjustable slide.

12. In a machine for gri ing razor blodes,=the combination Wiell a guidehaving a curved channel adopted to suppers :1 molly flat bladetemporarily bent to to the curvature of the channel, of :1 big; wheelprojecting into the c polishing wheel spaced flfifll"ll3f g1 Wheel andalso projecting into the enema said wheels being adapted to operate up ablade held against displacement. by t; curvature of the channel and thenatural resiliency of the blade, and means for "forwarding ablzule'through the channel.

13. 111. 1! machine for grinding razor blades, the combination with aguide having a curved channel adapted to support :1 normally fiat bladetemporarily bent. to conform to the curvature of the channel, said chainnel being formed by a horizontal rotatory turret having ii peripheryunbroken except by a'series of pins adopted to engage .e perforation ina blade and by a horizontal "stotionnry curved guide adjacent theperiphery of the turret, of El grinding wheel projecting into thechannel, e polishing wheel spaced from the grinding Wheel and alsoprojecting into the channel, said. wheels being edspt .i to operate uponit blade held sguinst dis placement. by the curvature of the chain will.and the natural resiliency of the blade, means for adjusting the WdEQlSwith re spect to the channel, and means for rotating the turret toforward blades through the clianncl.

In testimony whereof, we have signed our i names to this specifics tionin the presence. of two subscribin o witnes es.

THOM: JOHN EDRE i Witnesses:

9 mm n; l PRESCOIT, lfumn; ll. Vina,

